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(No Model.)

G. T. REISS.

BORING MILL ATTACHMENT.

' No. 274,517. Patented Mar.27,1883.

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UNITED STATES PATENT OFFICE.

GEORGE T. REISS, OF HAMILTON, OHIO, ASSIGNOR TO THE NILES TOOL WORKS, OF SAME PLACE.

BORING-MILL ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 274,517, dated March 2'7, 1883.

Applicationfiled September 23, 1882.

To all whom it may concern:

Be it known that I, GEoReE T. Rnrss, of Hamilton, Butler county, Ohio, have invented certain new and useful Improvements in Boring-Mills,ot which the following is aspecification.

This invention relates to a device to be attached' to boring and turning mills to cause the cutting tool to travel in a curved path in order to produce a circular crown upon beltpulleys; and it consists of a fixed former combined with a sliding tool-holder upon the end of the tool-bar, and a bar connecting them, as

hereinafter set forth.

In the drawings," Figure l is a front view of a boringmill embodying my improvement. Fig. 2 is a side view of the former asit would appear if viewed from the right-hand side of the boring-mill shown in Fig. 1." Fig. 3is the sliding tool-holder viewed in the same manner with former removed.

A is the bed of the boring-mill B, the table; 0 O, the housings: D, the top brace; E,

the crossrail; F, the saddle; G, the swing;

H, the tool-bar; I the hand-wheel for operating the tool by hand; J, the hand-wheel for throwing into action the power-feed for the tool-bar; K, the screw for traversing the saddle, and L the rod for transmitting the power-feed to the tool-bar, all constructed in the usual manner.

The cutting-tool is generally held in the end of bar H, and is fed downward or upward in right lines.

M is a head on the lower end of the tool-bar N a tool-holder dovetailed to slide horizontally in head M; 0, the cutting-tool; P, an arc-shaped former; Q Q, slides attached to former P and bolted to housing of mill; R, a threaded bar jourualed in tool-holder N; S, a nut on bar R, engaging with former P, and T a hand-wheel on bar R.

(No model.)

As the tool-bar feeds downward, the nut S, partaking of the same vertical motion, is guided by the former P, and serves to guide the toolholder N in a vertical path as defined by the former.

The hand-wheel T serves to adjust the tool to proper depth of out. For pulleys of different sizes the saddle, 850., are adjusted into proper position along the rail, as usual, and the slides Q permit the former P to be adjusted into a position close to the tool-bar, as shown.

To guide the tool by formers is not new in turning, and I make no broad. claim to such method, nor, broadly, to means for executing such method.

I claim as my invention- 1. In a boring-mill attachment, the combination, with the boring'mill, of a tool-holder fitted to slide across the lower end of the toolbar of the boring-mill, aformer attached to the frame of the boring-mill in a position substantially parallel with said toolbar, and a bar attached to said tool-holder, projecting in the direction of its sliding motion and engaging said former, substantially as shown and described.

2. In a boring-mill attachment, the combina tion, substantially as set forth, of tool-bar H, sliding tool-holder N, former P, slides Q, Q, threaded bar R, nut S, and hand-wheel T,substantially as shown and described.

3. In a boring-mill attachment, the combination, substantially as set, forth, of tool-bar H, sliding tool-holder N, former P, threaded bar R, nut S, and hand-wheel T, substantially as shown and described.

GEORGE T. REISS.

Witnesses J. W. SEE, ISRAEL WILLIAMS. 

